SI9174DM-T1-E3 [VISHAY]
High Performance Step-Down DC-DC Converter With Dynamically Adjustable Output Voltage; 高性能降压型DC -DC转换器具有动态可调输出电压型号: | SI9174DM-T1-E3 |
厂家: | VISHAY |
描述: | High Performance Step-Down DC-DC Converter With Dynamically Adjustable Output Voltage |
文件: | 总17页 (文件大小:296K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Si9174
Vishay Siliconix
High Performance Step-Down DC-DC Converter
With Dynamically Adjustable Output Voltage
D Synchronizable to13-MHz Clock
FEATURES
D User Selectable PWM, PSM, or AUTO Mode
D 2-MHz PWM Operation
D PSM Frequency w20 kHz for Inaudible
D Integrated MOSFET Switches
D 2.6-V to 6.0-V Input Voltage Range
D Minimal Number of External Components
D Up to 96% conversion efficiency
D 600-mA Load Capability
Harmonics
APPLICATIONS
D W-CDMA Cell Phone
D PDAs/Palmtop PCs
D LCD Modules
D 100% Duty Cycle Allows Low Dropout
D Integrated Compensation Circuit
D Over-Current Protection
D Portable Image Scanners
D GPS Receivers
D Smart Phones
D Shutdown Current < 2 mA
D Thermal Shutdown
D Integrated UVLO
D MP3 Players
D 10-Pin MSOP and Space Saving MLP33 Packaging
D DAC Input for Dynamic Output Voltage Adjustment
D 3G Cell Phone
D Digital Cameras
DESCRIPTION
The Si9174 is a high efficiency 600-mA step down converter
with internal low on resistance power MOSFET switch and
synchronous rectifier transistors. It is designed to convert one
cell LiIon battery or three cell alkaline battery voltages to a
dynamically adjustable dc output. The voltage on the DAC pin
controls the output voltage. The output voltage is adjustable
between 0.4 V and the input voltage VIN less a small dropout
voltage and settles in <30 ms.
minimize system noise, the switching frequency can be
synchronized to an external 13-MHz clock.
PSM mode provides increased efficiency at light loads. In PSM
mode the oscillator frequency is kept above 20 kHz to avoid
audio band interference. When operating in Auto mode, the
converter automatically selects operating in either PWM or
PSM mode according to load current demand.
In order to insure efficient conversion throughout the entire
load range, PWM (pulse width modulation), PSM (pulse
skipping mode) or Auto mode can be selected. In PWM mode,
2-MHz switching permits use of small external inductor and
capacitor sizes allowing one of the smallest solutions. To
The Si9174 is available in the10-pin MSOP and the even
smaller MLP33 package and is specified to operate over the
industrial temperature range of –40_C to 85_C. The Si9174
packaged in the MLP33 package is available in both standard
and lead (Pb)-free.
TYPICAL APPLICATIONS CIRCUIT
BATTERY
V
IN
2.2 mH
V
OUT
LX
V
DD
C
IN
10 mF
C
OUT
4.7 mF
R
1
Si9174
PGND
FB
SYNC
DAC
SD
13 MHz
DAC
ENABLE
R
2
PWM/PSM/AUTO
MODE
AGND
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
1
Si9174
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to AGND = 0 V
Thermal Impedance (Q )
JA
V
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 V
10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135_C/W
IN, DD
Lx, SD, MODE, FB, DAC, SYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to 6.2 V
(or to V )0.3 V whichever is less)
10-Pin MLP33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71_C/W
Peak Inductor Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 A
DD
GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to +0.3 V
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 125_C
Operating Junction Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.4 mW/_C above 85_C.
c. Derate 14 mW/_C above 85_C.
a
Power Dissipation (Package)
b
10-pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481 mW
10-pin MLP33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915 mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE
V
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6 V to 5.5 V
Inductor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 mH
Operating Load Current PWM Mode . . . . . . . . . . . . . . . . . . . . . . 0 to 600 mA
Operating Load Current PSM Mode . . . . . . . . . . . . . . . . . . . . . . . 0 to 150 mA
IN
C
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mF Ceramic
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7 mF Ceramic
OUT
SPECIFICATIONS
Test Conditions Unless Specified
Parameter
Limits
−40_C to 85_C, V = V
V
= 1.215 V, C = 10 mF,
IN
DD, DAC IN
C
OUT
= 4.7 mF, L = 2.2 mH, 2.6 V v V v 5.5 V
IN
Modef Symbol
Mina
Typb Maxa
Unit
R
= 11.3 kW, R = 20 kW
2
1
Under Voltage Lockout (UVLO)
Under Voltage Lockout (turn-on)
Hysteresis
V
IN
rising
2.3
2.5
V
0.1
Shutdown (SD)
Logic HIGH
Logic LOW
V
1.6
SDH
V
V
0.4
SDL
R
= 3.3 W
R = 51 W
L
100
100
L
Settle Within $2% accuracy SD rising
t < 1 ms
c
Delay to Output
t
en
ms
r
Pull Down
I
Input at V
mA
SD
IN
Mode Selection Tri-Level Logic (MODE)
MODE Pin HIGH
MODE Pin LOW
PWM
Auto
V
IN
−0.4
V
IN
V
0.4
MODE = GND
MODE = V
−5
Mode Pin Input Current
mA
5
IN
Oscillator
Frequency
f
1.6
2
2.4
0.8
MHz
MHz
OSC
External Clock Synchronization (SYNC)
Frequency
SYNC Input = 500 mV
13
p-p
Ac Coupled Sinewave
Frequency = 13 MHz
0.2
V
p-p
Error Amplifier (FB, DAC Pin)
V
V
DAC
+20
DAC
FB Voltage Accuracy
mV
−20
DAC Input Voltage Range
V
IN
> 2.6, V
V > 0.5 V
0.28
2.45
1
V
IN − DAC
Input Bias Current FB, DAC
I
V
FB
= 1.25 V
−1
0.01
mA
FBDAC
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
2
Si9174
Vishay Siliconix
SPECIFICATIONS
Test Conditions Unless Specified
Parameter
Limits
−40_C to 85_C, V = V
V
= 1.215 V, C = 10 mF,
IN
DD, DAC IN
C
OUT
= 4.7 mF, L = 2.2 mH, 2.6 V v V v 5.5 V
IN
Modef Symbol
Mina
Typb Maxa
Unit
R
= 11.3 kW, R = 20 kW
2
1
Converter Operation
Maximum Output
Current
PWM
PSM
I
I
V
V
= 3.6 V
= 3.6 V
600
mA
mA
LOAD
IN
Maximum Output
Current
150
LOAD
IN
e
Dropout Voltage
V
V
IN
= 2.6 V, I = 600 mA
OUT
190
300
300
mV
DD
Closed Loop Bandwidth
BW
kHz
PWM
PSM
PWM
PSM
I
= 30 mA to 600 mA
0.5
OUT
V
= 3.6 V
IN
c
Load Regulation
%
V
OUT
= 1.9 V @ 25_C
I
= 30 mA to 75 mA
0.25
"0.1
"0.1
200
OUT
Line Regulation
V
OUT
= 3.0 V, V = 3.5 V to 5.5 V
%/V
IN
PWM/PSM Switch Threshold Current
Maximum Inductor Peak Current Limit
I
AUpk
I
1500
Lpk
mA
Maximum NMOS
PWM
Negative Transition on V
1500
DAC
Transistor Current Sink
P-Channel
250
250
60
On Resistance
r
V
= 3.6 V
mW
DS(on)
IN
N-Channel
PWM
I
I
= 600 mA
= 30 mA
= 600 mA
= 30 mA
OUT
Output Ripple Voltage
0.05 W C
mV
p-p
OUT(ESR)
PSM
I
80
OUT
PWM
90
OUT
Efficiency
V
IN
= 3.6 V, V
= 3.3 V
%
OUT
PSM
I
80
OUT
Frequency
PSM
I
w 30 mA
20
kHz
OUT
Supply Current
PWM
PSM
500
400
800
2
I
SUPPLY
DD
Input Supply Current
(V
&
I
= 0 mA, V = 3.6 V (not switching, FB = GND)
IN
OUT
mA
V
IN
)
Shutdown Supply Current
I
SD = Low
SD
Thermal Shutdown
c
Thermal Shutdown Temperature
T
165
20
J(S/D)
_C
c
Thermal Hysteresis
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
b. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
c. Guaranteed by design.
d. Settling times, t , apply after t
.
s
en
e. Bypass is a device mode of operation, in which, the device is in 100% duty cycle. Bypass operation is possible in either PWM or PSM.
f. Operating modes are controlled with the MODE pin where Auto mode = MODE = LOW, PWM Mode = MODE = HIGH, and PSM mode = MODE = OPEN.
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
3
Si9174
Vishay Siliconix
PIN CONFIGURATION
MSOP-10
MLP33
1
2
3
4
5
10
9
L
PGND
X
L
10
9
8
7
6
PGND
V
IN
SYNC
SD
MODE
X
AGND
FB
V
IN
AGND
FB
2
3
4
5
8
SYNC
SD
V
7
V
DD
DAC
DD
6
DAC
MODE
Top View
Top View
PIN DESCRIPTION
Pin Number
Name
Function
1
2
3
4
5
L
Inductor connection
X
AGND
FB
Low power analog ground
Output voltage feedback
V
DD
Input supply voltage for the analog circuit.
Voltage from external DAC to adjust output voltage.
Used to select switching mode of the buck converter
PWM/PSM Pin Logic:
DAC
6
MODE
MODE Pin
Operating Mode
PWM
V
IN
Open
GND
PSM
AUTO
7
8
SD
Logic low disables IC and reduces quiescent current to below 2 mA
1
SYNC
Converter switching frequency can be synchronized to
Input supply voltage
/
6
of the clock frequency at this pin.
9
V
IN
10
PGND
Low impedance power ground
ORDERING INFORMATION
MSOP-10
Standard
MLP33
Standard
Part Number
Lead (Pb)-Free
Part Number
Part Number
Marking
Temperature
Marking
Temperature
Si9174DH-T1
9174
−40 to 85_C
Si9174DM-T1
Si9174DM-T1—E3
9174
−40 to 85_C
Additional voltage options are available.
Eval Kit
Temperature Range
Board
Si9174DB
−40 to 85_C
Surface Mount
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
4
Si9174
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM
V
DD
V
IN
Si9174
PMOS
Current Sense
Error
PWM
Comparator
Amplifier
FB
PWM and
Pulse
Skipping
Logic
−
Clamp
−
+
L
X
DAC
+
To IC Bias
Voltage
Reference
UVLO
NMOS
Current Sense
2 MHz
Oscillator
B6
AGND
SYNC
MODE SD
PGND
DETAIL DESCRIPTION
General
prevents false start-stop cycling as the input voltage
approaches the UVLO switching threshold. Start-up is always
accomplished in PWM mode to ensure start-up under all load
conditions. Switching to other modes of operation occurs
according to the state of the MODE pin and the load current.
The start-up sequence occurs after SD switches from LOW to
HIGH with VIN applied, or after VIN rises above the UVLO
threshold and SD is a logic HIGH.
The Si9174 is a high efficiency synchronous dc-dc converter
that is ideally suited for lithium ion battery or three cell alkaline
applications, as well as step-down of 3.3-V or 5.0-V supplies.
It is design to provide power to the power amplifier in WCDMA
cell phones, but can utilized in any applications requiring a
dynamically adjustable 600-mA power supply. The major
blocks of the Si9174 are shown in the Functional Block
Diagram. The 0.25-W internal MOSFETs switching at a
frequency of 2-MHz minimize PC board space while providing
high conversion efficiency and performance. The high
frequency error-amplifier with built-in loop compensation
minimizes external components and provides rapid output
settling times of <30 ms. Sensing of the inductor current for
control is accomplished internally without power wasting
resistors. The switching frequency can be synchronized to an
external 13-MHz clock signal.
Mode Control (MODE)
The MODE pin allows the user to control the mode of operation
or to enable the Si9174 to automatically optimize the mode of
operation according to load current. There are three different
modes of operation as controlled by the MODE pin. Switching
waveforms are shown in the Typical Switching Waveform
sections, page 9.
PWM Mode (MODE pin = HIGH)
Start-Up
With the MODE pin in the logic HIGH condition, the Si9174
operates as a 2-MHz fixed frequency voltage mode converter.
A NMOS synchronous rectification MOSFET transistor
provides very high conversion efficiency for large load currents
by minimizing the conduction losses. PWM mode provides low
output ripple, fast transient response, and switching frequency
synchronization. Output load currents can range from 0 to
600 mA.
When voltage is applied to VIN and VDD, the under-voltage
lockout (UVLO) circuit prevents the oscillator and control
circuitry from turning on until the voltage on the exceeds 2.4 V.
With a typical UVLO hysteresis of 0.1 V, the converter
operates continuously until the voltage on VIN drops below
2.3 V, whereupon the converter shuts down. This hysteresis
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
5
Si9174
Vishay Siliconix
The error amplifier and comparator control the duty cycle of the
PMOS MOSFET to continuously force the DAC pin and FB pin
voltages to be equal. As the input-to-output voltage difference
drops, the duty cycle of the PMOS MOSFET can reach 100%
to allow system designers to extract the maximum stored
energy from the battery. The dropout voltage is 190 mV at
600 mA.
provide smooth operation. Thus, the mode PSM-to-PWM
mode switchover current for increasing load currents is higher
than that of PWM-to-PSM mode switchover for decreasing
load currents.
Oscillator Synchronization (SYNC)
The internal oscillator provides for a fixed 2-MHz switching
frequency. In order to minimize system noise, the oscillator of
the Si9174 can be synchronized to an external clock, typically
an ac-coupled 13-MHz sine wave. An on-chip divide-by-six
circuit sets the converter switching frequency to 2.167 MHz in
this mode. The frequency lock range of the synchronization
circuitry is typically 20%. If synchronization is not required, the
SYNC pin must be tied to GND permitting the internal oscillator
to oscillate at 2 MHz.
During each cycle, the PMOS switch current is limited to a
maximum of 1.5 A (typical) thereby protecting the IC while
continuing to force maximum current into the load. Similarly,
the NMOS switch is internally limited to a maximum of 1.5 A
(typical) during negative output voltage transients.
Pulse Skipping Mode (MODE pin = OPEN)
By leaving the MODE pin open-circuit, the converter runs in
pulse skipping mode (PSM). In PSM mode the oscillator
continues to operate, but switching only occurs if the FB pin
voltage is below the DAC voltage at the start of each clock
cycle. Clock cycles are skipped thereby reducing the
switching frequency to well below 100 kHz and minimizing
switching losses for improved efficiency at loads under
150 mA. Although PSM mode switching frequency varies with
line and load conditions, the minimum PSM frequency will be
kept above 20 kHz for load currents of 30 mA or more to
prevent switching noise from reaching the audio frequency
range.
Dynamic Output Voltage Control (DAC)
The Si9174 is designed to dynamically adjust the output
voltage according to the voltage present on the DAC pin. The
output voltage is regulated to the same voltage the DAC pin
through the resistor divider. For VDAC within the voltage range
of 0.28 – 2.45 V, VOUT is proportional to VDAC according to the
following relationship:
R1
R2
+ ǒ1 ) Ǔ
VOUT
VDAC
Each time the PMOS switch is turned on, the inductor current
is allowed to reach 300 mA. Once achieved, the PMOS switch
is turned off and the NMOS switch is turned on in the normal
manner. However, unlike PWM mode, the NMOS switch, turns
off as the switch current approaches zero current to maximize
efficiency. The PMOS switch remains on continuously (100%
duty cycle) when the input-voltage-to-output-voltage
difference is low enabling maximum possible energy
extraction from the battery.
Converter Shutdown (SD pin)
With logic LOW level on the SD pin, the Si9174 is shutdown.
Shutdown reduces current consumption to less than 2-mA by
shutting off all of the internal circuits. Both the PMOS and
NMOS transistors are turned off. A logic HIGH enables the IC
to start up as described in “Start-up” section.
PSM mode is recommend for load currents of 150 mA or less.
Auto Mode
Thermal Shutdown
When the MODE pin grounded, the converter is set to Auto
mode. Switching between PWM mode and PSM modes takes
place automatically without an external control signal. For
heavy load operation, the converter will operate in PWM mode
to achieve maximum efficiency. When delivering light load
currents, the converter operates in PSM mode to conserve
power. The switchover threshold between the two modes is
determined by the peak inductor current, which is 300 mA
nominal. There is hysteresis in the switchover threshold to
The Si9174 includes thermal shutdown circuitry, which turns
off the regulator when the junction temperature exceeds
165_C. Once the junction temperature drops below 145_C,
the regulator is enabled. If the condition causing the over
temperature, the Si9174 begins thermal cycling, turning the
regulator on and off in response to junction temperature.
Restart from a thermal shutdown condition is the same as
described in the “Start-up” section.
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
6
Si9174
Vishay Siliconix
APPLICATIONS CIRCUIT
BATT
V
IN
2.2 mH
V
OUT
LX
V
DD
C
1
C
IN
10 mF
C
OUT
C
2
4.7 mF
Si9174
R
1
PGND
FB
SYNC
DAC
SD
13 MHz
DAC
ENABLE
R
2
PWM/PSM/AUTO
MODE
AGND
C
= 10 mF, Ceramic, Murata GRM42-2X5R106K16
IN
1
C , C = 0.01 mF, Vishay VJ0603Y 104KXXAT
2
C
R
R
L
= 4.7 mF, Ceramic, Murata GRM42-6X5R475K16
OUT
= 8.2 kW, Vishay CRCW06031132F
= 20 kW, Vishay CRCW06032002F
= 2.2 mH, Toko A914BYW-2R2M
1
2
1
TYPICAL CHARACTERISTICS
V
OUT
3.83
0.44
V
DAC
0.28
2.45
Figure 1.
V -vs. V Characteristics (V = 5 V)
OUT DAC IN
V
SDH
V
SDL
SD
t
r
t
f
t
f
t
r
V
DAC
2.5 V
Don’t
Care
Don’t
Care
0.2 V
t
t
s
Undefined
(Load Dependent)
en
3.47 V
V
OUT
0.4 V
t
s
Time
d Indicates V
settles to $2% of the final value.
OUT
Figure 2.
PWM Mode V
Settling
OUT
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
7
Si9174
Vishay Siliconix
TYPICAL CHARACTERISTICS
Dropout Voltage vs. I
Auto Mode Efficiency vs. Load
LOAD
100
200
160
120
80
V
IN
= 3.6 V
95
90
85
80
75
70
V
= 3.0 V
OUT
V
IN
= 2.6 V
V
IN
= 3.6 V
V
= 1.9 V
OUT
V
IN
= 5.5 V
40
0
0
100
200
300
400
500
600
0
100
200
300
400
500
600
Load Current (mA)
Load Current (mA)
PSM vs. PWM Efficiency
100
95
90
85
80
75
PWM
PSM
V
Ripple
OUT
100
80
60
40
20
0
V
V
= 3.6 V
IN
OUT
= 1.9 V
PSM
C
OUT
= 4.7 mF
0
100
200
300
400
500
600
Load Current (mA)
Auto Mode Efficiency vs. Load Direction
100
95
90
85
80
75
Load Decreasing
Load Increasing
PWM
0
30
60
90
120
150
Load Current (mA)
0
100
200
300
400
500
600
Load Current (mA)
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
8
Si9174
Vishay Siliconix
TYPICAL SWITCHING WAVEFORMS (V = 3.6 V, V
IN
= 3.0 V)
OUT
PWM mode Heavy-Load Switching Waveforms,
= 600 mA, MODE = HIGH
PWM Mode Medium-Load Switching Waveforms,
= 300 mA, MODE = HIGH
I
I
OUT
OUT
V
LX
, 5 V/div
V
LX
, 2 V/div
Inductor Current
500 mA/div
Inductor Current
500 mA/div
V
OUT
V
OUT
(AC-Coupled)
10 mV/div
(AC-Coupled)
10 mV/div
200 nS/div
200 nS/div
PWM Mode Light-Load Switching Waveforms,
= 0 mA, MODE = HIGH
PSM Mode Light-Load Switching Waveforms,
I
I
= 150 mA, MODE = OPEN
OUT
OUT
V
LX
, 5 V/div
V
LX
, 5 V/div
Inductor Current
200 mA/div
Inductor Current
200 mA/div
V
V
OUT
(AC-Coupled)
10 mV/div
OUT
(AC-Coupled)
10 mV/div
200 nS/div
1.0 mS/div
PSM Mode Light-Load Switching Waveforms,
I
= 30 mA, MODE = OPEN
OUT
V
LX
, 5 V/div
Inductor Current
200 mA/div
V
OUT
(AC-Coupled)
100 mV/div
2.0 mS/div
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
9
Si9174
Vishay Siliconix
TYPICAL WAVEFORMS (V = 3.6 V, V
IN
= 1.9 V)
OUT
PWM Mode Heavy-Load Switching Waveforms,
PWM Mode Medium-Load Switching Waveforms,
= 300 mA, MODE = HIGH
I
= 600 mA, MODE = HIGH
I
OUT
OUT
V
LX
, 5 V/div
V
LX
, 5 V/div
Inductor Current
500 mA/div
Inductor Current
500 mA/div
V
OUT
V
OUT
(AC-Coupled)
10 mV/div
(AC-Coupled)
10 mV/div
200 nS/div
200 nS/div
PWM Mode Light-Load Switching Waveforms,
= 0 mA, MODE = HIGH
PSM Mode Light-Load Switching Waveforms,
I
I
= 150 mA, MODE = OPEN
OUT
OUT
V
LX
, 5 V/div
V
LX
, 5 V/div
Inductor Current
200 mA/div
Inductor Current
200 mA/div
V
OUT
V
OUT
(AC-Coupled)
10 mV/div
(AC-Coupled)
100 mV/div
200 nS/div
1.0 mS/div
PSM Mode Light-Load Switching Waveforms,
I
= 30 mA, MODE = OPEN
OUT
V
LX
, 5 V/div
Inductor Current
200 mA/div
V
OUT
(AC-Coupled)
100 mV/div
2.0 mS/div
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
10
Si9174
Vishay Siliconix
TYPICAL START-UP AND SHUTDOWN TRANSIENT WAVEFORMS (V = 3.6 V, V
IN
= 1.9 V)
OUT
Start-Up, R
= 4 W
Start-Up, V = V = 3.6 V, R
IN SD LOAD
= 4 W
LOAD
V , V , 1 V/div
IN SD
V
V
, 1 V/div
SD
, 500 mV/div
OUT
V , 500 mV/div
OUT
20 mS/div
20 mS/div
Shutdown, R
= 4 W
Enable Switching, R
= 4 W
LOAD
LOAD
V , 1 V/div
SD
V
SD
1 V/div
V , 500 mV/div
OUT
V , 500 mV/div
OUT
200 mS/div
20 mS/div
TYPICAL MODE SWITCH TRANSIENT WAVEFORM
Output Transient At Mode Switch, I
= 30 mA
LOAD
V
OUT
(AC-Coupled)
200 mV/div
Mode Pin
1 V/div
100 mS/div
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
11
Si9174
Vishay Siliconix
TYPICAL LOAD TRANSIENT WAVEFORMS (V = 3.6 V, V
IN
= 1.9 V)
OUT
Load Transient, Auto Mode, I
= 30 to
Load Transient, PWM Mode,
LOAD
500 mA, MODE = LOW
I
= 30 to 500 mA, L = 2.2 mH, MODE= HIGH
LOAD
I , 200 mA /div
LOAD
I , 200 mA /div
LOAD
V
OUT
V
OUT
(AC-Coupled)
50 mV/div
(AC-Coupled)
50 V/div
10 mS/div
10 mS/div
Load Transient (PSM Mode),
= 30 to 150 mA, L = 2.2 mH
I
LOAD
I , 200 mA /div
LOAD
V
OUT
(AC-Coupled)
50 mV/div
100 mS/div
TYPICAL DAC INPUT RESPONSE WAVEFORM
Output Transient At Mode Switch, I
= 30 mA
LOAD
V , 1 V/div
DAC
V , 1 V/div
OUT
100 mS/div
Document Number: 71668
S-41148—Rev. C, 14-jun-04
www.vishay.com
12
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
Package Information
Vishay Siliconix
MSOP: 10-LEADS (POWER IC ONLY)
JEDEC Part Number: MO-187, (Variation AA and BA)
(N/2) Tips)
2X
5
A
B C 0.20
N N-1
0.48 Max
Detail “B”
(Scale: 30/1)
Dambar Protrusion
E
1
2
N/2
0.50
0.60
M
S
S
A
0.08
C
B
7
b
Top View
e1
b
1
With Plating
e
A
See Detail “B”
c
c
1
0.10
C
6
Section “C-C”
Scale: 100/1
(See Note 8)
-H-
A
1
Seating Plane
Base Metal
D
-A-
3
See Detail “A”
Side View
0.25
BSC
C
C
Parting Line
0.07 R. Min
2 Places
ς
S
A
2
0.05
Seating Plane
E
1
-B-
L
4
-C-
T
3
0.95
End View
Detail “A”
(Scale: 30/1)
NOTES:
1. Die thickness allowable is 0.203"0.0127.
N = 10L
MILLIMETERS
2. Dimensioning and tolerances per ANSI.Y14.5M-1994.
Dim
Min
Nom
Max
Note
3. Dimensions “D” and “E ” do not include mold flash or protrusions, and are
1
measured at Datum plane -H- , mold flash or protrusions shall not exceed
0.15 mm per side.
−
−
0.10
1.10
0.15
0.95
0.27
0.23
0.23
0.18
A
A1
A2
b
b1
c
c1
D
E
E1
e
e1
L
0.05
0.75
0.17
0.17
0.13
0.13
4. Dimension is the length of terminal for soldering to a substrate.
5. Terminal positions are shown for reference only.
0.85
−
8
8
0.20
6. Formed leads shall be planar with respect to one another within 0.10 mm at
seating plane.
−
0.15
7. The lead width dimension does not include Dambar protrusion. Allowable
Dambar protrusion shall be 0.08 mm total in excess of the lead width
dimension at maximum material condition. Dambar cannot be located on the
lower radius or the lead foot. Minimum space between protrusions and an
adjacent lead to be 0.14 mm. See detail “B” and Section “C-C”.
3.00 BSC
4.90 BSC
3.00
3
3
2.90
3.10
0.50 BSC
2.00 BSC
0.55
8. Section “C-C” to be determined at 0.10 mm to 0.25 mm from the lead tip.
9. Controlling dimension: millimeters.
0.40
0.70
4
5
10. This part is compliant with JEDEC registration MO-187, variation AA and BA.
11. Datums -A- and -B- to be determined Datum plane -H- .
12. Exposed pad area in bottom side is the same as teh leadframe pad size.
10
N
T
0_
4_
6_
ECN: S-40082—Rev. A, 02-Feb-04
DWG: 5922
Document Number: 72817
28-Jan-04
www.vishay.com
1
Package Information
Vishay Siliconix
MLP33Ć10 (POWER IC ONLY)
JEDEC Part Number: Outline is consistent with JEDEC MO229-VEED-2
Detail D
4 x Q
// ccc
C
A2
A3
A
A1
NX
0.08
C
Side View
Seating
Plane
C
Detail C
e
5
NX b
L2
M
M
bbb
C
C
A B
1
2
ddd
D
A
L + L2
L2
B
E
Detail C
A1
8
R2
Detail A
Detail D
Pin 1
Mark
4
N
N-1
(ND-1) x
Bottom View
0.20 Ref
6
7
aaa
C
2 X
1
Detail B
L2
e
TopView
7
2 X
aaa C
Datum A or B
Datum A or B
NX R1
L
NX R1
e2/2
L2
Terminal Tip
5
Terminal Tip
e
e
5
Even Terminal/Side
Detail B
L1
Odd Terminal/Side
0.17
0.30
L2
B
This Feature Applies To
Both Ends of The Package
Exposed Metalized Feature
Edge of Plastic Body
Detail A
Document Number: 72819
28-Nov-05
www.vishay.com
1
Package Information
Vishay Siliconix
MLP33Ć10 (POWER IC ONLY)
N = 10 PITCH: 0.50 mm, BODY SIZE: 3.00 x 3.00
MILLIMETERS*
INCHES
Dim
Min
0.80
Nom
Max
Min
0.031
Nom
Max
Notes
1, 2
A
A1
A2
A3
aaa
b
0.90
0.025
0.70
0.20
0.10
0.25
0.10
0.10
3.00 BSC
0.05
3.00 BSC
0.5
1.00
0.05
0.75
0.25
–
0.035
0.001
0.028
0.008
0.004
0.010
0.004
0.004
0.118 BSC
0.002
0.118 BSC
0.002
0.047
0.023
0.012
–
0.039
0.002
0.030
0.010
–
0
0
1, 2
0.65
0.15
–
0.026
0.006
–
1, 2
1, 2
1, 2
0.20
–
0.30
–
0.008
–
0.012
–
5, 11
1, 2
bbb
ccc
D
–
–
–
–
1, 2
1, 2
ddd
E
–
–
1, 2
1, 2
e
–
–
–
–
e2
1.10
0.45
0.20
–
1.20
0,58
0.29
–
1.30
0.65
0.45
0.125
0.043
0.018
0.008
–
0.051
0.026
0.018
0.005
1, 2, 9
1, 2
1, 2
5, 11
3
L
L1
L2
N
10
10
ND
R1 Ref
R2 Ref
Q
5
5
6
–
–
0.100
0.075
10_
–
–
–
–
–
–
5, 11
1, 2
1, 2
0.003
0_
12_
0_
10_
12_
* Use millimeters as the primary measurement.
ECN: S-52448—Rev. B, 28-Nov-05
DWG: 5924
NOTES:
1.
2.
3.
4.
Dimensioning and tolerancing conform to ASME Y14.5M-1994.
All dimensions are in millimeters. All angels are in degrees.
N is the total number of terminals.
The terminal #1 identifier and terminal numbering convention shall conform to JESD 95-1 SPP-012. Details of terminal #1 identifier are optional, but must
be located within the zone indicated. The terminal #1 identifier may be a molded, marked, or metallized feature.
5.
6.
7.
Dimension b applies to metallized terminal and is measured between 0.15 mm and 0.20 mm from the terminal tip.
ND refers to the maximum number of terminals on the D side.
Profile tolerance (aaa) will be applicable only to the plastic body and not to the metallized features (such as the terminal tips and tie bars.) Metallized
features may protrude a maximum of L2 from the plastic body profile.
8.
9.
The corner will be sharp unless otherwise specified with radius dimensions.
Package outline is consistent with JEDEC M0229-VEED-2.
Document Number: 72819
28-Nov-05
www.vishay.com
2
Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 11-Mar-11
www.vishay.com
1
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